Filter-press.



1. }OHNSON.

FILTER PRESS.

-APPLlcATmN FILED FEB. 9, 1912.`

Miam-ed May 1&3)

5 SHEETS-saus* i.'

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J. JOHNSON.

Y FlLTER PRESS. APPLICATION FILED FEB.9,1912.

Patented 18, 1915.

5 SH -SHEET 2.

Patented May 18, 1915.

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5 SHEETS-SHEET 3.

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FILTER PRESS.

APPLICATION FILED Fa. 9. 1912.

.Patented May 18, 1915.

5 SHEETS-SHEET 4.

' 1. JOHNSON. FILTER PRESS. APPLxcAnoN FILED. FEB. 9. l1912.

Patented May18,1915.

5 SHEETS-SHEET 5.'

. /W @amin ff Mikes s @s f JOHN JOHNSON, OF .BROOKLY1\T,'NEW YORK.

FILTER-BRESS.

Specification of Letters Patent.

Parenteel nay is, isis..v

Application filed February 9, 1912. Serial No. 676,478.

T all iii/mm it muy concern.'

, Be it known that I, .loi-1N JOHNSON, a citizen of the United States, residing at Brooklyn, New. York, have invented certain new and useful Improvements in Filter- Presses, of which the following is a clear,

full, and exact description.

, This invention relates to a force filter press oi the collapsible type, and has for its object the improyement in the construction vof the same to economy in operatie f y The press as herein shown may consist of one or more filteringcompartments and is designed to be used like the ordinary press in which the substance to be filtered is pumped or forced -into the interior of said compartments so as to drive the filtrate through a lining of filtering material such e as cloth.

It is further designed to permit of the walls of the filtering compartments being collapsed upon one another under meclianical power so as to still further compress vthe residue and drive through more filtrate.

*The chief difficulty heretofore with presses of this .character has, been in preventing the material from oozing out or escaping through the moving joints of the press during the collapsing movement of thecompartment walls, and in my present improvement I provide against this objection by a novel arrangement of moving joints which enables them to he covered and protected with filtering cloth, whereby not-hing but the filtrate'can escape through said joints'.

My arrangement may be varied by many different 'forms of constructions all utilizing the same principle, and I have-shown in the drawings and shall describe hereinafter in the specification several modifications of sueh'an arrangement.

My invention will be defined in the claims.

In the embodiment shown in the-drawings, which is my preferred construction, Figure l is a side elevation of the filter press haring a portion broken away in section;

Fig. 2 is a section through X-X of Fig. l'

showing a front elevation of a single filter plate; Fig. 3 is a section through a filter plate taken along YY of Fig. l; Fig. 4 is a front elevation of the'paeking ring having the locking ring and separating ring attached thereto; Fig. 5 is a section along Z-Z of Fig. y-l; Fig. 6 is a 'fragmentary secrtion of several filter platesA showing the promote efficiency` and means of locking the packingring with the filter plate yoke; Fig. 7 is a perspective` View of a portion of the cam of the locking ring;

Figs. 8, Stand i0 arel perspective views show- 60 ing the locking and separating rings in different positions or their operation; and Figs. ll and 12 are fragmentary sections vsimilar to Fig. 6 sliowing other modified forms of collapsible closure mechanism,

The main supporting frame of my filter press is indicated at l having the usual side runs 2 for supporting the several filter plates 3. These filter plates 3 are preferably circular inA form as shown in Fig. 2 and may be provided with suitable arms el for resting on said runs 9.. The opposite sides of said lfilter plates may be slightly concave,'as shown, to form filtering compartments, when the same are adjacently supported and held together. Said plates are also preferably apertured a't their centers 5, to afford communication between the several compart- 'nients so formed, and thus make up the entire filtering tank. Aninlet pipe'35 is shown at one end of said frame communieating with the central apertures of the filtering compartments, for introducing thereto under pressure ,the material or liquid to he filtered. The means for forcing this liquid into the filter press is not shown in the present embodiment, but it is understood that any convenient means may be used for this purpose. lAlso any suitable means for creating pressure, such as a hydraulic ram or pressure means 6 conventionally illustrated at the left of Fig. l, may be employed at the other end of a series of filter plates for forcing them together.

Secured te the face of each filter'plate is a lining of suitable filtering material, such as cloth 7.. This clothl may be suitably attached tothe plate by binding. thread 8 inthrough said cloth to run down and escape i llflv in Fig. 2 to permit the liquid filtered through outlets formed at the llower portion of said plates. j I Aprefer to construct lter plates substan-v tially hollow in cross-section, leaving cores..

12 in"`said hollow portion to prevent the walls from collapsing'under the tremendous---- pressure to which said platesfare'nsubjected. Flexible pipes 13 yand 15 communicate' with the interior of said plates by` conduits 14 y and Aserve to introduce a vheating medium', such as steam, hot air'or water'into said' plates. The steam maybe-led into'said interior by the upper pipes 13;:while the ylower pipes 15 may serve as a drain-or'outlet. ,-By j thus distributing heat throughout! each 'filter' lplate I am able to secure much better and quicker results in expelling-moisture from f the residue contained in said ltering compartment. j. .f f "fi" f 1 will nowv describe thegcollapsible jointstructure acting'as a closurefo'r the peripheral opening between .the ilterplates 'of each compartment andthe means for sealing said vopening against 'egress'.of "except tion of the coperating1 filter plate 3, vas

shown in Figs. '6410, and togetherform what I termfjoint surfaces 17 X, 3", for the iiltering compartment. The filter-lining or cloth 7' of thecompartment is preferably extended between these abutting face portions or jointsurfaces as shown. Behind -each packing member17 and preferably carried thereby is a variable spacing member orring-'18 having aqpin and .slot connection-with said y packing member for being slidably mounted thereon as shown inFig. 4. 'In the present embodiment the .variableA spacing'4 member 18 is formed vwith'teeth. 21r adapted tofcoperate with notches 22 at therear of shoulder 16 for variably spacing the packing member 174 therefrom. -Obviously the slidable move- `ment of the spacing ring 18 enables its teeth 21 to be brought into and out of register with the notches 22, so that the coperating ilter plates may be brought together a greater or less distance. Itis understood that previous to the collapsing of a lter press of this character material to be filtered is first pumped or forced into the same 'under great pressure for driving through as much filtrate as'possible, after which the collapsible mechanism should be adjusted to y @streef/enf' permit forcing plates nearer together under.

mechanical. power.` During the shifting o the spacing member-18 :Eorthis purpose the joint surfaces 17x and 3x should be securely locked together to prevent the egress of unfiltered material therebewteen... suitable locking means. or clamp may'` befy emplayedV Afor this purpose, and in thepres'ent embodiment I have provided a locking member'orfring 19 slidably mounted upon thev 3 rear fside fof the packing-.member lfby pin andv slot connections 271'; shown, the locking member.:l9rides upon the'upper side or thei spacing member,- L18 and saidlocking member'is "providedpwith'fone vopi s e surfaces" 31 adaptedftocoperate `w' .hanging arms 26 cai* face portion 3 .f against f which.' packin g member 17* is to-. bev` locked-.1? It 'is also desirable to retain'ffeach associated f? packing member", spacing member`- and 'locking' f'me'mber.. upon theircarrying shoulder.-v within a limited range' of -'sliding movement;- and in the embodiment shown l' in; Fig; "'flhave mounted uponI the vperiphery 'offea h flfvilter plate 3 inffbosses 25;(see Fig. 1) one yokes 23,0 ne'arm 2 6 ofwhichv over ngf. adjacentl'locking ring 19 and embra'eesythe same within a downwardly facingA notchBO, and the` other .arm 2S-10i lwhic'zhfo'veihangs andis normallylspaced fromtli front ci its retained packing member 17 zThe:right arm 26 of the yoke extends through jafsl'ot 1.32 of the adjacent packing member to the right,

observing Fig. 6, and they lockingfmember 19 is also slotted at 24 '(see. Fig. 7) adjacent the end of the cam surface-31 to permit the right-hand locking arm 26 of each yoke to be entirely withdrawn 'fromfth 4adjacent right-hand packing mechanism` 17,"19 when it is desired to open out widelybr-dismantle the entire press. u g i "1 Handles 33 and 34 are fixed to the .variable spacing vmember 18 and"I locking inemvbers 19 respectively fortslidingtliefsame into diierent positions; and the'y packing member 17 is provided with lsupportingpins 35? as shown, riding upo'nfside ruii'sj2. l. Fig. 11 shows in partialsection--aimodified form ofthe collapsibletjoiiitstructure i which acts as a closure'forfth' peripheral lopening of the iltering compartmentformed between'two filtering plates"3.` conich struction allows 'two separate collapsing operations to take place between two vopposed `filter plates 3,-since the mechanism separating said plates isprovide'd. withdnplicate i collapsible devices such as shown and previously described in regard to Fig. 6. To more readily understand the construction of Fig. 11 we may assume that in thel construction shown-in Fig. 6 the central filtering-'plate 3 has been'removed by cutting the same out along the line 11-11 yas; shown 1n 'Flg 6, leaving merely a separating ring iso nietige? s i@ 3a which is covered` with a filtering cloth 7a and is formed to carry upon its shoulder 16a collapsible andpacking devices of the same character as carried upon the shoulder 16 of the plates 3. vA filtering compartmentbuilt `according to the design shown-in Fig. 11 allows the walls 3 to approach or be collapsed toward each other twice the distance permitted by the construction of Fig. 6.

Another design of filtering compartment for permitting a double collapsing operation .between the walls of each compartment is shown in Fig. 12. In this modification each filtering plate 3b has formed upon its periph ery duplicate carrying shoulders 16b and 167 one at each side. Upon each of these carry ing shoulders is a full set of packing and collapsible devices such as are carried upon the shoulder 16 of the plates 3, comprising` 'a packing member 17a and locking member 19.a and a variable spacing member 18a. Between the opposed faces of the packing members 17L may. be located, if desired, a distance ring 3c, upon which may be lcarried the yokes 23, which in this case are formed at each lside with locking arms 26, which cooperate with the cam rings 19b formed simi-l lar to 19 for locking the packing members 17a against the interposed distance ring 3c. The variable spacing member 182L as shown in this modification is provided with teeth 21a upon both of its lateral edges which are adapted to coperate with notches formed upon the rear sides of the packing members 17a. Also upon this variable spacing device 18fL are carried the retaining arms 28a eX- tending both right and left for retaining each set of packing devices upon its associated carrying shoulder 16".

33a indicates the handle for moving the variable spacing member 18a. As shown, the filter lining 7 of the'compartment formed between two filter plates 3", is extended up-A wardly between the joint surfaces 17 andX of the packing members 17a and the distance ring 3C. It is obvious of course that the distance ring 3 may be omitted entirely7 if desired, and the opposed packing members 17a be made to abut each other upon the interposed filter lining 7 The operation of my filter press will now be described with regard to the form of collapsing joint-structure shown in Figs. 4 to 10, inclusive. Referring to Fig. 1, the xfilter plates 3 are closed tightly upon each other to form the usual filtering compartments, by any suitable mechanical pressure device, as the hydraulic ram (i shown. It is 'understood that in this first operation the teeth 21 of the variable spacing member 1S are out of register with notches 22 upon the shoulder 16 as shown in Fig. 8. The material to be filtered may then be pumped through the inlet 35 into the interior of the compartments under great pressure to 35, the communication with a pump is cut ofi' by any suitable valve (not shown) and the locking members 19are operated byhandles 34 to securely lock each packing member 17 against the opposed filter-plate to tightly close-the jointsurfaces 17X and 3X.

This operation is clearly disclosed in Fig. 9 in which the locking member or ring 19 is moved so that its cam face 31 cooperates with the over-hanging arm 26. When the packing members are locked to their opposed filter-plates, the pressure. from the hydraulic ram (5 is released sufiicient to move the variable spacing member or ring 21 around its shoulder 16 so as to register the teeth 21 with the notches22, as shown in Fig. 10.

The' purpose of locking the packing members 1T against the opposed filterplates 3 will now become apparent,1for if they were not so locked the pressure of the substance contained within each filtering compartment .would tend to separate the joint surfaces 17X andV 3* thereof and allow the escape of material between edges of the filtering cloth. 1t is also obvious that any locking or clamp- 'ing means other than that shown maybe employed for locking the packing member y 17 againstits opposed filter-plate during vjoint between the surface 17x of packing member 17 and thepsurface 3X of the opposed filter-plate 3 into which the filter cloth extends, is firmly sealed against egress by the locking members. After this collapsing operation the press is extended by carrying the leftmost filtering plate to the left as shown in Fig. 1, whereby its yoke arms 2G withdraw the packing and spacing devices from the notches 227 separating the walls of each compartment successively. If it is desired to dismantle the entire apparatus.` the notches 24 are brought into alinement with the yoke arms 2G so that these arms may pass therethrough and allow their associated filter plate to be entirely separated from the opposed filter plate tothe right.

In View of the foregoing description it is not considered necessary to particularly deperipheral opening between said side walls,

comprising a packing member, a' carrying shoulder upon which vsaid member is slidably mounted, an abutting face portion opposed to said'packing member, means for lockingthe front of lsaid packing member against said face portion, and a spacing device therefor separable from said side walls mounted upon said -lcarrying shoulder-at the rear of said packing member.

2. In a force filter press in combination, a compartment formed of separable side walls, collapsible joint-structure for closing the peripheral opening between said side walls, comprising a packing member, a carrying shoulder upon which said member is slidably mounted, an abutting face portion opposed to said packing member, means for locking the front of said packing member against said face portion, a spacing device mounted upon said carrying shoulder at the reariof 'said packing member, and retaining means for holding said packing member, locking means, and spacing device upon said carrying shoulder.

3. A force filter press comprising in combination a collapsible tank of one V'or more compartments, each formed of separable sidewalls substantially', lined with filtering material, collapsible joint structure for closing the peripheral openings between the coperating side walls, comprising one or more packing members and corresponding carrying shoulders upon which said packing members are slidably mounted, an abutting face portion opposed-to 'eachw packing member with the filter lining of the corresponding compartment extending therebetween, cam means for locking the 'front of each packing member against-said opposed face portion upon the interposed filter lining for sealing the oint, a spacing device mounted upon said carrying shoulder at the rear of each packing member, and retaining means forholding each associated packing member, cam means, and spacing device upon its corresponding carrying shoulder.

4. force filter press comprising'in'combination, a collapsible tank .of onek or more compartments, each formed of separable opfiltering material, and having an inlet4 posed filter plates substantially lined with through their centering for substance to be filtered, collapsiblev 'j oint-structure for clos-4 ing the peripheral openings between said coperating filter plates, comprising a packing member.

ing ring, a carrying shoulder formed adjacent the periphery of said plates upon which said packing ring is slidably mounted, an abutting face portion formed upon the opposed plate, the fil-ter lining of said compartment extending between said abutting' face portion and packing ring, a cam ring' 5. In a force filter-press in combination, a i

compartment formed'of separable sidewalls, a collapsible jointstructure for closing the peripheral opening between ,said walls, coinprising a toothed spacing'device and an opposed portion` having notches coperating therewith.

6. In a force filter-press in combination, a compartment formed of separable side walls,

a collapsible joint-structure for closing the i 'peripheral opening betweenv said walls, comprising a packing member, an opposed portion having an abutting joint surface, cam means for locking said packing member against said joint surface comprising a camcarrier slidably mounted adjacent said packlter-press in combination, a compartment formed ofseparable side walls, a collapsible joint-structure for closing the peripheral opening between -said walls. comprising a packingmember, an opposed portion having an abutting joint surface, cam means, for lockingY said packing member against said joint surface, comprising a eamcarrier slidably mounted adjacent said packing member, and cam coperatingl elements carried by said opposed joint surface portion. l

8. In a force filter-press in combination, one o r more compartments each formed of side walls spaced apart, pressure means for forcing said side walls toward one another, a collapsible joint-structure for closing the peripheral opening betweensaid side walls 7. Ina force comprising abutting portions, means for .locking the'same together and spacing devices for saidside walls and separable `therefrom.

9. In a force filter-press in combination, one or more compartments each formed of side walls spaced apart, pressure means for forcing said side walls ltoward one another, a collapsible joint-structure for closing-the ico,

iia

peripheral opening between said side walls comprising abutting portions, means for locking the same together and spacing devices mounted adjacent said sidewalls and sliiftable ivitb relation thereto for holding [said side Walls apart against the force of said pressure means.' 1.0. ln a force ilterpre'ss in combination,

,one or more compartments each formed ci side Walls spaced apart, pressure means for forcing' said side Walls toward one another,

a collapsible joint-structure for closing tlie one or more compartments each formed of side Walls spaced apart, pressure means for y forcing said side Walls ltoward one anotlier, a

collapsible joint-structure for closing the 'peripheral opening between said side walls.

conriprising` abutting portions and sliding portions, a filter lining `for said side Walls covering said sliding portions and extending between the surfaces of said abutting portions, means for locling-said abutting por- 25 side Walls spaced apart, a collapsible joint-.30 structure for closing tlie peripheral openings A between said side Walls comprising abutting portions, pressure means for forcing saidi abutting portionstogetlier, means for locking'said 'abutting portions together, said 35 locking. means being iiree from any pressure exerted-by said pressure `means when torcing said abutting portions togetlien Signedatltlew York city, lil. Y., this l2 clay of January, @112.

. A JHN JHNSN.

-Witnesses:

BEATRICE Minime, .Annan/i' Bnnits'iniil. 

